<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
<script>
   /*  var str='987'
    str.slice(1)
    console.log(str);
    console.log(str.slice(1));
    str.substring(1)
    console.log(str); */
    function romanToNum(s){
        for(let i in s){
            console.log(1);
        }
    }

    romanToNum('9999')
</script>
</html>